Charles's Wain
- archaic, chiefly Brit. the Plough in Ursa Major〈古, 主英〉（大熊星座内的）北斗七星。
词源
Old English Carles wægn 'the wain of Carl (Charlemagne)， perhaps because the star Arcturus was associated with King Arthur， with whom Charlemagne was connected in legend.